[机] four lever arm type double-acting hydraulic shock absorber
sì gān bì shì shuāng dòng shuǐ lì jiǎn zhèn qì ㄙˋ ㄍㄢ ㄅㄧˋ ㄕˋ ㄕㄨㄤ ㄉㄨㄥˋ ㄕㄨㄟˇ ㄌㄧˋ ㄐㄧㄢˇ ㄓㄣˋ ㄑㄧˋ
四杆臂式双动水力减震器